Amazon byte counter
Amazon limits the search terms field to fewer than 250 bytes, not characters. Paste your backend keywords to see the byte count, the room left, and which characters take more than one byte. Nothing is uploaded; the counting happens in your browser.
- Bytes
- 102
- Bytes without spaces
- 86
- Characters
- 100
- 147 bytes left
Inside the limit of 249 bytes
- é2 bytes × 1
- ñ2 bytes × 1
How many bytes is a character?
| Character | Bytes |
|---|---|
| a–z, 0–9, a space, basic punctuation | 1 |
| ä, ö, ü, ß, é, ñ, ç | 2 |
| € and most Chinese, Japanese and Korean characters | 3 |
| Emoji | 4 |
Making the 249 bytes count
- Only words the title, bullets and description do not already use. Amazon indexes those fields anyway.
- Lowercase, single spaces. Commas and semicolons cost a byte each and add nothing.
- No brand names, no ASINs, no claims such as “best” or “new”.
- Singular or plural, not both: Amazon matches either form.
The full method is in Amazon backend keywords: how to use all 250 bytes
Bytes are one rule of several. To check the search terms for duplicates and wasted words, along with the title, bullets and description, use the free Amazon listing checker
Questions
- Is the limit 250 bytes or 249?
Amazon asks for fewer than 250 bytes, so 249 is the most that is safely inside. The counter treats 249 as full.
- Do spaces count?
Amazon’s help says spaces are not counted toward the limit, while sellers report listings where they were. The counter shows both numbers. Keep the one with spaces under 250 and you are safe either way.
- Why bytes and not characters?
Amazon meters the field in bytes of UTF-8. In English a character is one byte. Accented letters such as ä, é and ñ take two, and most Chinese, Japanese and Korean characters take three.
- What happens over the limit?
Amazon may ignore the whole field, not only the part that does not fit. That is the reason to count before saving.
- Is my text uploaded anywhere?
No. The counting runs in your browser; nothing you paste leaves the page.